[INFO] cloning repository https://github.com/milesand/calculator-the-solver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/milesand/calculator-the-solver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] aa074792688f3ccc44a51a3e5b7af26239e9751d
[INFO] testing milesand/calculator-the-solver against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmilesand%2Fcalculator-the-solver" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/milesand/calculator-the-solver on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/milesand/calculator-the-solver
[INFO] finished tweaking git repo https://github.com/milesand/calculator-the-solver
[INFO] tweaked toml for git repo https://github.com/milesand/calculator-the-solver written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/milesand/calculator-the-solver already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded num-complex v0.1.41
[INFO] [stderr]   Downloaded num-bigint v0.1.41
[INFO] [stderr]   Downloaded num-rational v0.1.41
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 667bba47d5535356bd06528548da536e40c37f717ffaf79542888d75aaf921c6
[INFO] running `Command { std: "docker" "start" "-a" "667bba47d5535356bd06528548da536e40c37f717ffaf79542888d75aaf921c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "667bba47d5535356bd06528548da536e40c37f717ffaf79542888d75aaf921c6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "667bba47d5535356bd06528548da536e40c37f717ffaf79542888d75aaf921c6", kill_on_drop: false }`
[INFO] [stdout] 667bba47d5535356bd06528548da536e40c37f717ffaf79542888d75aaf921c6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9f2ebc3483ad4b80c983c409dfbe3e2c6ed77f074713d896cd7fcb1569a9f047
[INFO] running `Command { std: "docker" "start" "-a" "9f2ebc3483ad4b80c983c409dfbe3e2c6ed77f074713d896cd7fcb1569a9f047", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.1.42
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num-integer v0.1.35
[INFO] [stderr]    Compiling num-complex v0.1.41
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling num-iter v0.1.34
[INFO] [stderr]    Compiling num-bigint v0.1.41
[INFO] [stderr]    Compiling num-rational v0.1.41
[INFO] [stderr]    Compiling num v0.1.41
[INFO] [stderr]    Compiling calculator-the-solver v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `OpKind` is imported redundantly
[INFO] [stdout]    --> src/op.rs:102:13
[INFO] [stdout]     |
[INFO] [stdout] 17  | / enum OpKind {
[INFO] [stdout] 18  | |     Add(i32),
[INFO] [stdout] 19  | |     Mul(i32),
[INFO] [stdout] 20  | |     Div(i32),
[INFO] [stdout] ...   |
[INFO] [stdout] 27  | |     Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 },
[INFO] [stdout] 28  | | }
[INFO] [stdout]     | |_- the item `OpKind` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 102 |           use self::OpKind;
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Op` is imported redundantly
[INFO] [stdout]    --> src/op.rs:195:13
[INFO] [stdout]     |
[INFO] [stdout] 12  | / pub struct Op {
[INFO] [stdout] 13  | |     inner: OpKind,
[INFO] [stdout] 14  | | }
[INFO] [stdout]     | |_- the item `Op` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 195 |           use self::Op;
[INFO] [stdout]     |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `OpKind` is imported redundantly
[INFO] [stdout]    --> src/op.rs:247:13
[INFO] [stdout]     |
[INFO] [stdout] 17  | / enum OpKind {
[INFO] [stdout] 18  | |     Add(i32),
[INFO] [stdout] 19  | |     Mul(i32),
[INFO] [stdout] 20  | |     Div(i32),
[INFO] [stdout] ...   |
[INFO] [stdout] 27  | |     Rpc { from_digits: u8, from_n: u32, to_digits: u8, to_n: u32 },
[INFO] [stdout] 28  | | }
[INFO] [stdout]     | |_- the item `OpKind` is already defined here
[INFO] [stdout] ...
[INFO] [stdout] 247 |           use self::OpKind;
[INFO] [stdout]     |               ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated constant `std::sync::ONCE_INIT`: the `new` function is now preferred
[INFO] [stdout]    --> src/op.rs:197:9
[INFO] [stdout]     |
[INFO] [stdout] 197 | /         lazy_static! {
[INFO] [stdout] 198 | |             static ref RPC_PATTERN: Regex = Regex::new(r"(\d+)=>(\d+)").unwrap();
[INFO] [stdout] 199 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(deprecated)]` on by default
[INFO] [stdout]     = note: this warning originates in the macro `__lazy_static_create` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `try_from` has been stable since 1.34.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(try_from)]
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `option_filter` has been stable since 1.27.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(option_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `calculator-the-solver` due to 3 previous errors; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "9f2ebc3483ad4b80c983c409dfbe3e2c6ed77f074713d896cd7fcb1569a9f047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9f2ebc3483ad4b80c983c409dfbe3e2c6ed77f074713d896cd7fcb1569a9f047", kill_on_drop: false }`
[INFO] [stdout] 9f2ebc3483ad4b80c983c409dfbe3e2c6ed77f074713d896cd7fcb1569a9f047